460
FZPN03 KNHC 090328
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
0430 UTC SAT AUG 09 2025

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS

SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE
HEIGHT OF THE HIGHEST 1/3 OF THE WAVES. INDIVIDUAL WAVES MAY BE
MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.

SECURITE

E PACIFIC FROM THE EQUATOR TO 30N E OF 140W AND 03.4S TO THE
EQUATOR E OF 120W

SYNOPSIS VALID 0000 UTC SAT AUG 09.
24 HOUR FORECAST VALID 0000 UTC SUN AUG 10.
48 HOUR FORECAST VALID 0000 UTC MON AUG 11.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM IVO NEAR 20.5N 112.1W 999 MB AT 0300 UTC AUG 09
MOVING W OR 275 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65
KT. TROPICAL STORM FORCE WINDS WITHIN 30 NM OF CENTER EXCEPT 20 NM
SW QUADRANT. SEAS 4 M OR GREATER WITHIN 75 NM NE QUADRANT...30 NM SE
QUADRANT...30 NM SW QUADRANT...AND 60 NM NW QUADRANT WITH SEAS TO
5.5 M. ELSEWHERE WITHIN 180 NM NE SEMICIRCLE AND 120 NM SW
SEMICIRCLE OF CENTER WINDS 20 TO 33 KT. SEAS 2.5 TO 4 M. REMAINDER
OF AREA FROM 19N TO 24N BETWEEN 108W AND 114W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3 M IN MIXED SE AND SW SWELL.
.24 HOUR FORECAST TROPICAL STORM IVO NEAR 21.0N 114.7W. MAXIMUM
SUSTAINED WINDS 50 KT GUSTS 60 KT. LITTLE CHANGE IN RADIUS OF
TROPICAL STORM FORCE WINDS AND SEAS 4 M OR GREATER. ELSEWHERE WITHIN
60 NM OF CENTER...EXCEPT 120 NM NE QUADRANT WINDS 20 TO 33 KT. SEAS
2.5 TO 4 M. REMAINDER OF AREA FROM 20N TO 23N BETWEEN 110W AND 116W
WINDS 20 KT OR LESS. SEAS 2.5 TO 3 M IN MIXED SE AND SW SWELL.
.48 HOUR FORECAST POST-TROPICAL IVO NEAR 21.9N 118.6W. MAXIMUM
SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM FORCE WINDS AND
SEAS TO 4 M WITHIN 30 NM N SEMICIRCLE...20 NM SE QUADRANT AND 0 NM
SW QUADRANT.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE
AND INTENSITY.

.SYNOPSIS AND FORECAST.

.N OF 29N BETWEEN 112W AND 114W...INCLUDING THE NORTHERN GULF
OF CALIFORNIA...SE TO S WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.12 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.

.FROM 19N TO 24N W OF 138W WINDS 20 KT OR LESS. SEAS 2.5 TO 3 M
IN MIXED E AND SW SWELL.
.12 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.

.FROM 05N TO 11N BETWEEN 110W AND 127W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3 M IN S TO SW SWELL.
.18 HOUR FORECAST FROM 04N TO 10N BETWEEN 122W AND 129W WINDS 20 KT
OR LESS. SEAS 2.5 TO 3 M IN S TO SW SWELL.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST S OF 08N BETWEEN 128W AND 131W WINDS 20 KT OR
LESS. SEAS TO 2.5 M IN DECAYING S TO SW SWELL.

.S OF 02.5S BETWEEN 110W AND 120W WINDS 20 KT OR LESS. SEAS 2.5 M
IN S TO SW SWELL.
.18 HOUR FORECAST CONDITIONS TO MERGE WITH AREA OF S TO SW SWELL
DESCRIBED ABOVE.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.

CONVECTION VALID AT 0315 UTC SAT AUG 09...

.TROPICAL STORM IVO...NUMEROUS MODERATE WITHIN 90 NM SW AND NW
QUADRANTS. SCATTERED MODERATE WITHIN A 30 NM WIDE LINE FROM 19N113W
TO 20N115W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH AXIS EXTENDS FROM 09N84W TO 13N100W TO 14N110W TO
14N118W TO 09N130W TO 11N135W TO 11N140W. SCATTERED MODERATE FROM
06N TO 08N BETWEEN 89W AND 105W AND FROM 11N TO 15N W OF 136W.

$$
.FORECASTER AGUIRRE. NATIONAL HURRICANE CENTER.